What part of the retina is responsible for the sharpest vision?
A. Posterior retina
B. Fovea centralis
C. Optic disc
D. Ora serrata
E. All of the choices are correct.
Answer: B
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The initial energy "investment" needed to start a chemical reaction in a cell is called the
a) energy of products. b) energy of reactants. c) potential energy. d) Gibb's free energy. e) activation energy.
Which of the following events occurs on the postsynaptic membrane?
A. Neurotransmitter combines with a receptor molecule B. Release of Ca2+ C. Rapid degradation of acetylcholine D. Release of neurotransmitter E. Acetylcholine production
Osmoreceptors depolarize after they ________ in response to ________ plasma osmolarity.
A) swell, increased B) swell, decreased C) shrink, decreased D) shrink, increased
Peptide hormones are synthesized by cytoplasmic ribosomes as active enzymes
Indicate whether the statement is true or false